Brace-drill



(No Modell) E. E. ANTHONY.

BRAGB DRILL.

Patented June 12, 1894.

frm/6711507" UNITED STATES PATENT- OFFICE.

ELLIOT E. ANTHONY, OF DETROIT, MICHIGAN.

BRACE-DRILL.

SPECIFICATION forming part of Letters Patent No. 521,327,dated June 12, 1894. Application filed April 10, 1893. Serial No. 469,719. (No model.) .i

To all whom it` may concern.-

Be it known that I, ELLIOT E. ANTHONY, a subject of the Queen of Great Britain, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain nevir and useful Improvements in Brace-Drills, of which the following is a specification, reference being-had therein to the accompanying drawings.

The invention consists in the peculiar construction of the actuating mechanism for the drill, whereby the revolutions of the drill may be increased, if desired without increasing the speed of the handle, or whereby the drill may be used as a common drill, turning with the handle, or whereby it may be used as a ratchet drill.

The invention further consists in the peculiar construction, arrangement and combination of the various parts, as more fully hereinafter described. v

In the drawings, Figure l is a diagram elevation of my improved device. Fig. 2 isa vertical, central section through the actuating mechanism for the bit. Fig. 3 is a top plan View of the gear. Fig. 4 is a horizontal section on line w in Fig. 2. Fig. 5 is a vertical section on line 'y y in Fig. 3.

A is the socket journaled at its upper end in the lower end of the crank B, which is provided at its upper end with a swiveled head C for receiving the hand or breast of the workman.

D is the handle journaled upon the vertical portion of the crank provided at its lower end with a guard plate E, having an inwardly extending nipple F surrounding the shaft F which forms the vertical portion of the crank.

Gis a sprocket wheel journaled on the shaft F below the handle D.

H is a sprocket chain passing around the wheel G and beside the sprocket wheel I at the upper end of a shaft I', which is formed at the upper end of the socket A, thence around the idler wheel J which is journaled on the shouldered screw J. This screw has a shoulder engaging the "upper face of the horizontal portion K of the crank and a screwthreaded portion a, passing through said portion K and entering a tapering nut b, which engages in a tapering slot c, and is adjustable longitudinally therein by means of the adj ust- O ing screw d, so as to give therequired tension to the sprocket chain. horizontal portion K of the crank is bifur- Tne outer end of the cated, as shown in Fig. 2, and the sprocketV wheels I and idler .I are located on top of said arm K; between the bifurcations is a ratchet wheelL.

L is a shaft secured across the bifurcations in rearof the ratchet wheel. Upon this shaft are journaled pawls d e, oppositely arranged in relation to the ratchet wheel, which areprovided with a lug f, adapted to bearfagainst the curved springj, which acts to hold them in their adj usted position. Either or both of these pawls may be engaged with the ratchet Wheel and both may be removed therefrom by turning them into the position, shown in Fig. 4 in full lines for the pawl d.

M is the hub of the sprocket wheel G which is extended upward from said Wheel on one side and is provided on such extension with the ratchet wheel N.

O O are oppositely arranged spring pawls adapted to be engaged with said ratchet wheel and provided with finger pieces P for moving them in or out.

The pawls d and e are provided with corresponding nger pieces k.

The parts being thus arranged their operation is as follows: If the device is intended to be used for a drill multiplying the speed of the bit, the operator throws in both of the pawls O O and throws out one or both of the pawls d c. Then the rotation of the crank B by its handleD will turn the sprocket wheel G and through the medium of the sprocket chain will rotate the sprocket pin I and the socket A, carrying the bit. If the multiplication of the speed of the bit is not desired, both of the pawls c d are arranged with the ratchet wheel L, locking the shaft I from rotation and thereby causing the bit to turn with the crank at the same speed.

If it is desired to use the device for a ratchet drill, oneV of the pawls O O is thrown in engagement, whichever is desired to be used, and the corresponding pawl d e, so that rotation in one direction only will turn the drill.

The object of passing the sprocket chain around the .idler J and -at one side of the sprocket I is to reverse the movement of the latter, thus driving the bit in the saine direction that the crank is turned.

What I claim as my invention is- 1. In a brace drill the combination with the socket, crank and handle journaled on the` crank, of a sprocket wheel journaled below the handle, a ratchet wheel formed integral with the sprocket wheel, oppositely arranged spring pawls on the lower end of the handle adapted to be engaged with the ratchet wheel, a shaft at the upper end of the socket, 1 a sprocket wheel and a ratchet wheel on said u shaft, a sprocket chain connecting the wheel on the crank with the sprocket wheel on the shaft, and two oppositely arranged pawls ar- 1 ranged to engage the ratchet wheel on the shaft, substantially as described.

`on the socket, and a screw on the crank engaging `the shouldered screw for adjusting the idler wheel, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ELLIOT E. ANTHONY.

Witnesses:

M. B. ODOGHERTY, N. L. LINDor. 

